A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
Fix leaking roof valley flashing.
And damaged flashing is behind most roof leaks.
Small holes or corroded spots in flashing can be easily repaired.
The nail will provide a path for the water.
First roughen the area around the hole with a wire brush or sandpaper and then clean it.
Cut each side at the upper end of the valley to conform with the.
In order to lay the flashing the shingles on the roof will have to be removed.
Roof vent pipes are common areas for roof leaks.
Insert a nail in the hole where water is leaking through the roof.
Plug pinholes with roofing cement and patch holes up to about 3 4 inch in diameter with a patch from the same material as the flashing.
Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal cutters.
This project identifies some of the causes of leaking roofs including damage to ridge tile mortar damage to verge tile mortar damage to lead flashing around the chimney stack and how damage can occur in a roof valley.
Once the roof valley has begun to leak you will need to cover the valley with flashing in order to prevent a repeat of the problem.
If the ice and water shield is missing then you will have to remove the shingles on both sides along the valley put ice and water shield in place and re shingle the roof.
If leaks continue to occur from ice dams consider installing roof edge heating cables.
In either situation the leaking roof valley can be fixed by removing affected shingles and structural elements and upgrading your roof s flashing.
Roof vent pipes from plumbing or exhaust vents penetrate the roof and are usually sealed using a collar style flashing made out of a flexible material like epdm rubber or flexible pvc.
The valley flashing laid over the joint where the two roofs meet should overlap the step flashing at least 2 in.
Leaking roof identifying the cause of a leaking roof and how to repair storm damage to roofs.
How to identify a leaking roof and fix it.
Find them locally at hardware stores or home centers.
A metal lining under the membrane secures that the valley will never puncture again.
Step 2 place a bucket underneath the nail to catch the water as it runs down the nail.
